I just downloaded the new version of Xamarin last week. In the old time, I need to install a mac host agent and ran it every times. That is not very good. I found the new version can build the ios app without that Mac Host Agent. They use SSH remote login to build the app. You only have to enter "remote login" in the spotlight search, then enable remote login in sharing windows. Then that is!
However, I found my iOS device still need to connect with my mac book. If they can do the debug redirect to my windows laptop, then that is great!